Integra DTR-7.4 instruction manual Troubleshooting Guide, Symptoms, Causes, Remedies

Troubleshooting Guide

If a problem occurs while you are using the remote controller, first try to operate the controls on the front panel of the DTR-7.4 to make sure that it is not due to a malfunction (or dead batteries) in the remote controller.

	Symptoms	Causes	Remedies
			Make sure that the power cord is properly plugged
		Power cord is disconnected.	into the wall outlet. Make sure that the other end
			of the power cord is properly connected to the
	No power.
			DTR-7.4’s AC INLET (See page 27).
		External noise is affecting the internal	Turn off the power, wait five seconds, and then
		microcomputer.	turn the power back on (See page 27).
POWER		“Muting” is displayed.	Press the Muting button on the remote controller
	Power turns on but no		to turn off muting (See page 40).
	sound.	Bad connections or wiring.	Check connections, speaker cables, and other wir-
			ing (See pages 18 to 26).
	Sound of playback source	Input selector is not set properly.	Set to correct input source (See page 40).
			Lower volume and then disconnect headphones
	is not heard.	Headphones are connected.
			(See page 40).
	Power shuts off immedi-	Amplifier protection circuitry is activated.	Remove the power cord from outlet immediately.
	ately after power on.		Contact your Onkyo service center.
		Speaker cable is not connected.	Check the connection between DTR-7.4 and
			speaker (See page 18).
			Set the Listening mode to any mode other than
		Listening mode is set to Stereo, Pure Audio	Stereo, Pure Audio or Direct. The output to the
	No sound from the center	or Direct.	center speaker may differ depending on the listen-
	speaker, or at very low vol-		ing mode (See page 44).
	ume.	Center speaker volume is set to minimum.	Set the center speaker level to the appropriate vol-
			ume (See pages 34, 35).
			Set the Center setting to “Large” or “Small” at
		The Center setting is set to “None.”	Setup Menu → Speaker Setup Menu → Speaker
			Config Sub-menu (See page 33).
			Set the Subwoofer setting to “Yes” at Setup Menu
SPEAKERS	No sound or very low vol-	Subwoofer setting is set to “No.”	→ Speaker Setup Menu → Speaker Config Sub-
			menu (See page 33).
	ume from subwoofer.
		Subwoofer volume is set to minimum.	Set the subwoofer level to the appropriate volume
			(See pages 34, 35).
		Not properly grounded.	Check outer conductor of input plugs.
	Low frequency humming
		Turntable motor is not properly grounded.	Check for proper ground connection.
	is heard.
		Audio connection cables on the rear panel	Adjust the placement of the cables to reduce hum.
		are connected incorrectly.
	Howling is heard when the	Turntable and speakers are located too	Move them farther apart.
	volume is turned up.	close together.		Appendix
	heard. High range is not	Turntable needle is dirty or worn, or a	Refer to the instructions of the connected compo-
		problem exists with a connected compo-
	Rough or scratchy sound is		nents and check for problems.
		nent.
	clear.		Turn treble setting down at Setup Menu → Audio
		Treble control is too high.	Adjust Menu → Tone Control Sub-menu (See
			page 54).
	AM stations cannot be	AM loop antenna is not connected.	Connect the included AM loop antenna to the AM
	received.		antenna terminals (See page 14).
TUNER
	Buzzing noise on AM sta-		Move the AM loop antenna to different position.
	tions (particularly notice-	Noise from electrical apparatus such as
FM/AM	able at night or with weak	fluorescent lamp.	Set up an outdoor AM antenna (See page 15).
	stations).
	Noise is heard at high-		Place the AM loop antenna as far as possible from
	pitched sounds on AM sta-	Noise caused by TV set.	the TV.
	tions.		Move DTR-7.4 away from TV set.

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